Tool or cutter grinding machine.



N0. 683,|94. l Patented Sept. 24, |90I. J. BATH.

TOOL 0B CUTTER GRINDING MACHINE.

lApplx'cation filed Dec. 31, 1990.)

(No Model.) 6 Sheets-Sheet I.

1u: Noszms PETERS co. moro-uno., wunmmon. Dy c.

{ Patented sept. 24, 190|. J. BATH.

TUOL 0H CUTTER GBINDIIIG MACHINE.

(Application lsd Dec. 31. 1900.)

(Nn Model.)

6 Sheets-Sheet 2.

/ff fis Innung?. i 1

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No. ea3,|94.

J. BATH.

-TUOLDR CUT-TER GRINDING MACHINE.

Patented, Sept. 24, 190i.

(Application led Dec. 31, 1900.)

6 Sheets--Sheet 3.

(No Model.)

WITJEEES:

No. 683,|94. Patented Sept. '24, |90I. J. BATH.

TOUL 0R CUTTER GBINDING MACHINE. (Apzlication led Dec. 31, 1900.) (NoModel.) 6 Sheets-Sheet 4.

N0. 683,!94. Patented Sept. 24, |90I. J. BATH.

TOUL 0B CUTTER GRUNDING MACHINE.

(Application led Dec. 31, 1900.)

(No Model.)

6 Sheets-Sheet 5.

ma Hemus r-:Yius co, Nom-umu.. WASHINGTON. u c.

No. 6a3,|94`. Patented sept. 24, |901. J. BATH.

TOUL 0R CUTTER GRINDING MACHINE.

(Applicntion led Dec. 31. 1900.)

ESEEE:

(No Model.)

Tn: Nonms PETERS C0. pHoro-mma.. wAsHmmnn, D c

` UNiTnn STATES PATENT GFFICE.

JOHN BATH, OF VALTHAM, MASSACHUSETTS.

Tool.y oR'cuTTER -GRINDING MACHINE.

SPEGFICATEQN forming part of Letters Patent No. 683,194, dated September24, 1901.

Application tiled December 31,1900.V Serial No. 41,552. (No model.) i ITo ctZ-Z wiz/m, t may concern: Beit known that I, JOHN BATH, a citizen othe United States, residing at Waltham, in

the county of Middlesex and State of Massachusetts, have invented newand useful Improvements in Tool or Cutter Grinding Machines, ot whichthe following is a specificalion.

This invention relates to that class ot' machines,commonly termeduniversal tool and cutter grinders, for grinding tools, cutters, arbors,disks, gages, and many other articles y and implements made of metal;and it relates particularly to different portions of the machine itselfand not to the attachments for holding the tools or cutters to beground.

The improvements consist in certain novel constructions and arrangementsof parts whereby the table may be used so as to produce a slow and quickfeed and an exact adjustment,whereby it can be run well oftin either oftwo opposite directions without the loss of the use of the parts,whereby exposure of the knee to grit and dirt .is prevented, whereby theparts of the machine for sustaining or controlling the grinding-wheelsare rendered susceptible of a variety of adjustments while in motionwith relation to the tool-holder, whereby the frame permits of the useof unusually large grinding-wheels having more contact on the work,whereby said wheels are held normally in a raised position above thework, and whereby the machine is rendered more eilicient in otherrespects in its operation, all as fully described below, and illustratedin the accompanying drawings, in which- Figure 1 is a side elevation ofmy improved machine. Fig. 2 is a front elevation of the same with thedust-guard removed. Fig. 3 is a plan. Fig. 4 is a sectional view takenvertically and .centrally through the machine. Fig. 5 is an enlargedsectional View taken on line X, Fig. 2. Fig. 6 is an enlarged detailview in side elevation looking from the left. Fig. 7 is a horizontalsectiont-aken on line Y, Fig. 6.

Similar characters of reference indicate corresponding parts. p

1 represents the base, which supports the machine. Secured to this baseby bolts 3,

Fig. 4, is a plate 2, which supports the pedestal 4, said pedestal beingcentered by means of the downward projection 5, which extends through acorresponding central opening in the plate. The pedestal is providedwith an annular liange 6, upon which the sleeve 7 rests rotatively, andis set at any degree in the circle by registering it with the frictiondial-ring 8, Figs. 1, 2, and 4, which is made rigid with the pedestal bya suitable set-screw 9. Projecting forward from and integral with thesleeve or hub 7 are knees 10, preferably tw'o in number, for supportingthe bed which sustains the slide for supporting the table, all as belowdescribed. The rotative hub 7 is locked at any desired position withrelation to the dial by an ordinary clamp-screw`11, Fig. 1, the arm 12of which tightens the ears 13 and causes the sleeve to bind on thepedestal. thereto by suitable bolts 14 is the frame 1-5, whose lowerendis formed withadownwardlyprojecting annular fiange 16, which operatesto prevent dust and grit from lodging on the upper end of the sleeve orhub 7. The frame or standard 15 is formed up into the two arms 17, eachof which is curved or bent'back rearwardly from the portion 15 and fromeach of which extends rearwardly a horizontal supporting-arm 18,sustaining the shaft-19, which is connected with the power. A pulley 2Oon the shaft 19 is connected by a belt 21, Figs. 1, 2, and 3, with apulley 22 on a spindle 23, Fig. 2, having its bearings in arms 24, whichare integral with the upwardly-exten ding vertical holder 25, Figs. 2,3, 4, 6, and 7. This holder is provided with one or more rows ofvertically-arranged teeth 26, constituting racks, which are engaged bygear-wheels 27, Fig. 7, on the studl 28, provided at its outer end witha hand-wheel 29 and having its bearings in the vertical bracket 30,bolted at 31 to the horizontal base 32, which is rigidly se` cured toand supported by the frame 17. This base is integral with a web 33, andboth the base and web are integral with the tubular post 34, throughwhich the holder 25 extends and which is adapted to hold said postrigidly by means ot' a suitable clamping-screw This tube is providedwith asuitable opening iu its side, through which the gearwheels 27extend into engagement with the rack. The vertical movement of theholder Seated on this pedestal and secured f ICO 25 is guided by asuitable key 36, Fig. 7. A cover 37, Fig. l, is provided for the holder25 in order to keep ont dirt and grit, said cover being represented inFig. 3 as having been removed. Pivotally supported at 38 in the bracket30 is a swinging arm or plate 39, slotted at 40, and thereby adjustablysecured rigidly by means of the bolt 4l in the desired position on thebracket 30. (See Figs. l, 6, and 7.) Supported by and having itsbearings in this swinging arm is a stud 42, provided with a hand-wheel43, said stud engaging by an ordinary worm-gear 44 with the stud 28.

The spindle 23 has fast on it a pulley 45, which is adapted to beconnected by a belt 46 with a spindle 47, whose outer end is providedwith an emery-wheel 48 for grinding internal work. The supportingmechanism of this spindle is described below. In practice when themachine is started and before the spindle and emery-wheel 47 48 haveattained their highest speed but a comparatively slight tension isneeded on the belt to keep it from slipping on the pulley; but after themachine has attained its properspeed and the emery-wheel is ready to beapplied to the work I desire to apply greater pressure to the belt 46 inorder to overcome the resistance of the friction of the einery-wheel onthe tool to be ground. In order to apply this additional tension to thebelt, I first loosen the screw 41 and allow the arm 39 to drop, thusdisengaging the worm-gear, and then lift the holder 25 in the arms 24,in which the spindle 23 has its bearings, by turning the ,hand-wheel 29,by means of which the gearwheels 27 act on the racks 26, and thenholding it in position by means of the clampingscrew. Having thusadjusted the belt, if a more exact adjustment is desired the clamp 35and screw 4l are loosened and the wormgear 44 put into engagement, whenthe handwheel 43 may be turned and the stud 28 adjusted to a nicety,thus bringing the holder 25 to the exact height desired and increasingor decreasing the tension of the belt 46, as required.

The spindle 47 is adjustably supported in the usual manner in the jaws49 of the arm 50, whose hub 5l is adjustably supported rotatively byYmeans of suitable ears 52 and a clamp-screw 53 to the horizontal arm 54,detachably sustained by the frame l5. Thus the spindle 47 is supportedfrom the firmest and most rigid portion of the frame of the machine at apoint near the base where there cannot possibly be any spring, and whenthe arm 50 is once adjusted on a particular machine further adjustmentis usually unnecessary under any circumstances, all further adj ustmentsbeing for tightening the belts under speed and in the manner abovedescribed. Hence the holder for the spindle 47 after having beenjonceadjusted needs no readjust` ment without regard to the position of thetable, the head-stock, the belt-tightenin g mechanism, or any other partof the machine. In other words, the spindle does not lose its positionwhen the belt is tightened or any other part of the machine adjusted.

55 represents the head-stock,constructed in the main as usual andclamping the box 56, forming a bearing for a spindle, upon which thepulley 57 is fast, said pulley being integral or rigid with the chuck58. This pulley is adapted to be connected to the power in any suitablemanner. The mechanism forclamping the head-stock on the box 56 comprisesthe lips or flanges 59 60, (see Fig. 5,) the vertical pin 61, extendingthrough said lips and `engaging the under lip by means of the threadedportion 62, the annular flange or collar 63, rigid on the pin betweenthe lips, the thimble or case 64, surrounding the pin above the lip 60,the handle 65, extending through the thimble into the pin, a bushing 66,surrounding the pin within the upper lip, and a suitable set-screw 67,extending through the lip against said bushing. To clamp the headstockmore tightly on the box, the screw is turned to the right by the handle65, which rotates with it the thimble 64, and thus forces the lip 60down toward the lip 59. When the clamp is to be loosened, the handle isrotated in the reverse direction, thus releasing the lip 60 and liftingthe collar or flange 63 up toward or against the upper lip. Theheadstock is supported in the longitudinal groove 68, reverse-T-shapedin cross-section, in the surface of the table 69, suitable clampingmechanism being employed to hold the head-stock in any desired positionin the groove. This table is centrally pivoted at 7l, Fig. 4, to the bed72, and said bed is formed on its under side with a longitudinal slide73, which extends into a corresponding longitudinal groove 74 in theunder bed 75, and is furthermore provided with an overlapping dust-guard76 on its rear side. The under bed is formed with rearward extensions77, Fig. 3, and the entire bed slides rearward and forward in themachine in suitable ways. The under bed 75 is reciprocated rearward andforward in the machine, carrying with it the upper bed 72 and the table69 by means of the screw 79, which screws into the bar 80, making aportion of the frame of the machine. The forward portion of this screwis provided with a suitable flange 8l behind its bearings in thedust-guard 82 and with a hand-wheel 83. By rotating this wheel the lowerbed is moved laterally in the machine rearward and forward, carryingwith it the upper bed 72 and table 69. (See Fig. 4.) The dust-guard, inwhich this screw has its bearings, is of substantially the shape shownin Fig. 4 and is secured by suitable screws 84 to the front of the bed75, as shown in Figs. l, 3, 4, and 5, but not in Fig. 2, as it isremoved in that figure. This guard is for the purpose of preventing allgrit, dust, o1

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bits of steel from collecting upon or fouling the screw 79 or any of theparts below the table which move in relation to each other.

Secured longitudinally to the under side of the under bed 72, near therear portion thereof, is a rack 85, having teethl on its front surface,as indicated in Figs. et and 5. Meshing into this rack is a gear-wheel86, keyed to a vertical shaft 87, having its bearings in the under bed75, as indicated in Fig. 5. Loose on this shaft is a tapered hub 88,split at 89 and threaded at 90. Integral with this hub is the worm-gear91. A clamping-wheel 92 is internally threaded and cone-shaped toengageand fit upon the cone-shaped hub 88. By rotating this hand-wheel the hub88 is contracted and clamps the stud 87,'thereby rotating it. The hub 88rests upon a collar 93 on the stud. The worm-gear 91 is engaged by theworm 91 on the transverse shaft 95, which has its bearings in the box96, extending horizontally forward from a plate 97, Figs. 1 and 3,bolted to the lower bed at the right of the dust-guard 82. To slide thebed 72 longitudinally, the hand-wheel 98 is rotated, thus engaging,through the mechanism above described, the stud 87 and by means of thegearwheel 86 engaging therack 85. By means of this mechanism a slow butexact longitudinal adjustment, which is also a lockis provided for thebed 72. In order to furnish a quick adj ustmentfor the same bed, Iprovide a shaft 99, supported in abearing 100, extending from a plate101, secured to the front of the machine at the left of the dust-guard82. (See Figs. 2, 3, 4, and This shaft is provided with a hand-wheel 102at its outer end and at its inner' end with a gear-wheel 103, Figs. 1and 4, which engages with teeth 104, Figs. 4 and 5, on the under side ofthe rack 85. Thus quick longitudinal movement may be impart-ed to thebed 72. The front edge of the bed 72 is provided with a grooved way 105,from which a bolt 10G extends forward, whereby the longitudinal movementof the table may be limited by means of any suitable contrivancesprojecting up from the dust-guard 82.

From the opposite ends of the table 69 project wings 107 and 108, eachprovided with a slot 109 on the arc of the circle of which the pin 71 isthe center, said slotted wings being preferably protected by suitablecovers 110, (one only being shown in Fig. 3.) Clampingbolts 111 extendfrom the bed 72 up through said slots, thus limiting the rotativemovement of the bed. Said bolts, however, are removable, so that the bedcan be rotated on a longer arc, if desired. A bracket 112, Figs. 1, 2,and 3, projects from the right end of the bed 7 2, and resting upon thisbracketis a plate 113, provided with a slot 114, which is concentric andof substantially equal length with the slot 108. A clam ping-bolt 115secures the plate adjustably to the bracket 112. The

plate is substantially C-shaped and arranged (E RID as shown, whereby anarm 110 extends into the space formed by the C-shaped plate over thebracket, and set-screws 117 extend through the plate horizontally andset against opposite sides of the arm. It will be seen, therefore, thatthe table 69 is rotative adjustably for the length of the slots 109 withrelation to the bed 72, that it is further rotative adjustably withrelation to the bed 72 for the length of the space between the ends ofthe C-shaped plate 113 less the width of the arm 116, that the table 69and bed 72 are adapted to slide longitudinally on the bed 75 forsubstantially the entire length of the table or for so much less itsentire length as is desired, and that the table and two beds 72 and '75can be moved laterallythat is, backward and forward-in the ways 78. Thusthe table is rotative to the extent of the length of the slots 108, orto the extent of the combined length of one of the slots 108 andtheinside of the platev113, or to 4 any greater extent by removing theclampingbolts, .or it is adjustable longitudinally or transversely.Moreover the longitudinal adjustment may be a quick adjustment byoperating the wheel 102, and there is in addition a slow and exactadjustment produced by the operation of the wheel 98.

0n the shaft 23 is an emery wheel or grinder 118 for grinding surfaceswhich are supported in the usual'manner in the head-stock 55 after thechuck 58 has been removed. When this emery-wheel is to be used, the arms50 and 54, the latter of which is supported in a socket 119, Figs. 2 and4, are removed from the machine, together with the belt and pulley 15and 46. The chuck 58 is then removed and the tool to be ground appliedto the head-stock. The shaft 23 is then lowered in order'to drop thegrinding-wheel 118 into the proper position by releasing the swingingarm V39 and turning the wheel 29. Then if an exact adjustment is desiredthe slotted arm 39 is swung in,vso that the worm-gear 44 may be inengagement, and the wheel 43 rotated. The counterbalance ICU IOS

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120 is connected by a suitable chain 121 with renders thegrinding-wheels applicable to external work or practically any knownstyle of tool or surface. By means of this construction, in which theframe 15 17 is recessed or bent rearward and the supporting-shaft forthe grinding-wheels is in a raised position, the grinding-wheels can belowered and brought forward to their work, no raising of theemery-wheels being necessary, they being always suspended above thework.

IIaving thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is-

l. In a tool and cutter grinding machine, the stationary frame 15supported on a suitable pedestal and provided with therearwardly-recessed portion 17; a vertically-adjustable holder; thehorizontal spindle 23 sustained by said holder; mechanism for drivingthe spindle; the horizontal arm 54; supported bya socket 119 sustainedby the frame; the arm 50 having its rear end adjustably rotativelysupported by the arm; and suitable jaws at the outer end of said arm 50for supporting a grinding-spindle, substantially as set forth.

2. In a tool and cutter grinding machine, the stationary frame 15supported on a suitable pedestal and provided with therearwardly-recessed portion 17; a vertically-adj ustable holder; thehorizontal spindle 23 sustained by said holder; mechanism for drivingthe spindle; an arm swinging vertically from the frame and adapted tosupport a grinding-spindle; the vertical tubular post 34 supported bythe frame; the holder 25 sliding vertically in said post; mechanisms forimparting quick and slow vertical movements respectively to the holderand for locking the same at any desired height; the horizontal spindleor shaft 23 supported by the holder at its lower end; the arm 50swinging vertically from the frame and capable of being set at anydesired angle and adapted to hold the grinding-spindle; and a pulley onsaid spindle or shaft 23, whereby rotation is communicated to thegrinding-spindle by means of a belt, whereby the spindle or shaft 23 maybe raised by lifting the holder, and pressure applied to the belt atspeed, substantially as described.

3. In a tool and cutter grinding machine, the stationary frame 15supported on a suitable pedestal and provided with therearwardly-recessed portion 17; a vertically-adjustable holder; thehorizontal spindle 23 for supporting a grinding wheel for external work;a suitably-supported grinding-tool for internal work, said spindle beingin a raised position whereby theemery-wheels are always suspended abovethe work; mechanism for lowering the holder which sustains the spindle;and mechanism for driving the spindle, substantially as set forth.

4. In a tool and cutter grinding machine, the" frame; the under bed 75sliding in the frame; mechanism for imparting lateral orbackward-and-forward movement to the bed; the upper bed 72 sliding onthe bed 75; mechanism for imparting quick and slow longitudinalmovements as desired thereto with relation to the under bed 75; and thetable (i9 supported by the bed '72 and adapted to rotate thereon,substantially as described.

5. In a tool and cutter grinding machine, the frame; the under bed 75sliding in the frame; mechanism for imparting lateral orbackWard-and-forward movement to the bed; the upper bed 72 sliding onthe bed 75; mechanism for imparting quick and slow longitudinalmovements as desired thereto with relation to the under bed the table 69rotai tively supported by-the bed 72; the wings 107 and 108 extendinghorizontally from the opposite ends of the table and provided with thecurved slots 109; clamping-bolts extending from the bed 72 up throughsaid slots; the plate 113 supported by a bracket extending from one endof the bed, said plate being located beyond one of said wings andprovided with a slot which is concentric with the slot in said wing; aclamping-bolt extending through the slot in the plate to the bracket; anarm extending horizontally from the wing toward the plate; andset-screws extending horizontally from the plate on opposite sides ofand against said arm, substantially as set forth.

6. In a tool and cutter grinding machine, the head-stock 55 providedwith the lips 59 and G0; the vertical pin 6l extending through said lipsand engaging the under lip by means of its threaded portion the annularflange or collar 63 rigid on the pin between the lips; the thimble orcase 64 surrounding the pin above the upper lip; the handle 65 on thepin; the bushing 66 surrounding the pin within the upper lip; and asuitable set-screw extending through the upper lip against said bushing,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HENRY W. W'ILLIAMS, A. N. BoNNEY.

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